Despite the official artwork depicting Hammer Mario with his normal complexion and outfit colors underneath, his NES sprite depicts him with tan skin in levels, a white shirt, white shoes, and black overalls, while his 16-bit sprites depict him with a brown shirt and gray overalls.

Super Mario Advance 4 adds a new utility to this form: its hammers can break Gray Brick Blocks.

This form is not to be confused with Mario or Luigi wielding a hammer, with the difference being the infinite disposable supply of hammers and the black shell armor.